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In the latest Hawaii Five-0, we get some closure for one storyline (McRollins), make some progress on another (Abby), and take down a Russian spy. All in a day’s work.

First, our case of the week. A doctor is scrubbing in for surgery, but rather than cutting into the patient, she uses the scalpel to slice into everyone in the room and kills the patient and two of the medical staff in the process. (Stuff like this doesn’t even happen on Grey’s Anatomy, so you know it’s crazy.)

At the crime scene, the team deduces that the patient was the target of a hit; the rest of the doctors and nurses were collateral damage. Before the killer left, she cut into a recent surgery incision on the patient’s abdomen. Something was implanted there—but what?

Kono tracks the patient to David Yang, a disgraced plastic surgeon who does backroom surgeries. Steve and Danny swing by his Chinese medicine shop to have a chat. Yang tries to claim doctor-patient privilege, but the patient’s dead, and he’s not a doctor. He admits he implanted a flash drive in the victim’s belly, but he doesn’t know what was on it. But he does know the name of the man who paid for the surgery—Chris Dalton, a cyber strategist (a.k.a. an anti-hacker).

Steve and Danny go to speak to Dalton, but his boss, Elliot Brenner, says he’s part of an internal investigation and is unable to speak to them. Steve is insistent. Unfortunately, when they get to the room where he was being held, Dalton has already escaped out of a broken window.

Brenner tells Steve that Dalton was being investigated because he used his security clearance to download classified NSA files about black-ops intel. Steve orders Brenner to update the NSA; all of their undercover agents are at risk.

Kono and Grover check out Dalton’s house, but he’s not there. They do find out who the killer from the hospital is, though: Anna Novick, Dalton’s girlfriend—and a Russian spy.

But if Anna has been killing to get the flash drive, they’re obviously not working together. And when Dalton contacts her to meet up after his escape, he’s putting himself in serious danger. This becomes clear when Dalton and Anna are surrounded by Five-0, and she pulls out a machine gun and starts shooting. Anna escapes the shootout, but Dalton is taken into custody.

During the interrogation, Dalton says he wanted to use the intel as leverage to force the NSA to do less surveillance on Americans, but obviously Anna had other plans. He’s upset she recovered the drive, but it’s heavily encrypted. The only key to unlock it is in his head.

But the interrogation goes sideways when gas starts pouring out of the vents and everyone in the entire building passes out. Anna strolls in with a gas mask and takes Dalton, but Steve is able to uncover Anna’s location from one of her goons, and the team bursts in before the file is decrypted.

Steve, for one, is super-glad the files are saved in time, because it turns out Catherine’s name was in one of them. That’s right: Catherine is working deep undercover in Ukraine. With the case wrapped, Danny checks in with Steve about the whole deal. Steve says that he’s angry Catherine that lied to him about where she was going, but he understands why she did. Danny suggests that maybe she just didn’t want Steve to worry about her. Not sure any of us really believe that, but Danny is a good friend for trying.

The final piece of our H50 puzzle this week is Abby. Steve hosts a team meeting to discuss Danny’s discovery that Five-0 is being investigated, and now they know by whom. The man investigating them is Robert Coughlin, a federal prosecutor, and the brother of Rex Coughlin. (The IA agent who tried desperately to arrest Chin and whom Gabe stabbed through the eyeball last season. That murder gave me nightmares. Thanks for showing it again, guys.)

The team isn’t sure if this is an official investigation or if Coughlin is on a personal vendetta, but regardless, their first step is figuring out who is working for him. (The answer, we know, of course, is Abby.)

Abby sets up an impromptu meeting with Robert to warn him that the team knows about him, and her days as a mole are numbered. She also throws in her two cents about the case. She hasn’t seen anything that warrants disbanding or arresting the team. But Coughlin argues that Abby is just letting things get personal because of her relationship with Chin. He is in charge, and Abby will stay undercover or lose her badge.

But apparently Abby comes up with a third option, because by episode’s end, she goes to see Chin. There’s something she needs to tell him …

Expression Of JoyThe Brady Bunch: Groovy! The Bradys: Ritual hugging Married…With Children: ”Oh, great.” Thirtysomething: ”Of course I’m happy for you. Really. But what about me? Why does it always have to be about you? The Flintstones: ”Yabba-dabba doo

Expression Of Rage

The Brady Bunch: ”Hmmm…” The Bradys: ”If you back away from something you really want, then you’re a quitter!” (the angriest any Brady has ever been) Married…With Children: ”Aaagh, God, take me from this miserable life!” Thirtysomething: ”I’m not angry, OK?” The Flintstones: ”Willllmaaaa!”

Typical ProblemThe Brady Bunch: Marcia and her rival both want to be the prom queen. The Bradys: Bobby gets paralyzed. Married…With Children: Al doesn’t buy his family Christmas presents. Thirtysomething: Nancy gets cancer. The Flintstones: Fred and Barney are staying out too late.

Typical SolutionThe Brady Bunch: The prom committee decides to have two queens. The Bradys: Bobby gets married. Married…With Children: They hate him. Thirtysomething: If only we knew… The Flintstones: Wilma and Betty decide to follow them.

Attitude Toward SexThe Brady Bunch: Never heard of it The Bradys: Omigod — even Cindy does it! Married…With Children: Peg: Yes. Al: No. Thirtysomething: They didn’t get all those kids by accident. The Flintstones: Prehistoric

How Spouses FightThe Brady Bunch: They don’t. The Bradys: Infrequently, but it happens Married…With Children: Tooth and nail Thirtysomething: They stop talking The Flintstones: Fred and Barney go bowling while Wilma and Betty max out their charge cards.

How Kids Get Into TroubleThe Brady Bunch: Greg takes a puff of a cigarette. The Bradys: Carol’s grandson steals her business cards and sticks them in the spokes of Bobby’s wheelchair. Married…With Children: By committing felonies Thirtysomething: Ethan plays with a forbidden toy rocket. The Flintstones: They don’t.

How They’re Punished

The Brady Bunch: ”It’s not what you did, honey — it’s that you couldn’t come to us.” The Bradys ”Next time, ask.” Married…With Children: By the authorities Thirtysomething: It blows up in his face. The Flintstones: They’re not.

What Family Does For FunThe Brady Bunch: Takes special three-part vacations to Hawaii and the Grand Canyon The Bradys: Has flashbacks Married…With Children: Exchanges insults Thirtysomething: Talks The Flintstones: Attends showings of The Monster at the Bedrock Drive-In

Unsolved MysteriesThe Brady Bunch: How exactly did Carol’s first husband and Mike’s first wife die? The Bradys: What’s with Marcia’s new face and Bobby’s blonde hair Married…With Children: What kind of hair spray does Peg use? Thirtysomething: Why did Nancy take Elliot back? What do Gary and Susanna see in each other? The Flintstones: How does Barney’s shirt stay on if he has no shoulders? Where do Fred and Wilma plug in their TV?

Worst BehaviorThe Brady Bunch: The Brady children once made Alice feel under-appreciated.

Best Reason To WatchThe Brady Bunch: This is what life should be. The Bradys: They’re all grown-ups now! Married…With Children: Terry Rakolta hates it. Thirtysomething (Tie) This is your life. This isn’t your life. The Flintstones: This is what life might have been.

Best Reason Not To WatchThe Brady Bunch: Blurred vision from rerun overdoses. The Bradys: You’re all grown-ups now. Married…With Children: She has a point. Thirtysomething: After a while, you think it’s real. The Flintstones: The Simpsons